<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<input type="text" id="i1" placeholder="姓名">
<input type="text" id="i2" placeholder="工资">
<input type="text" id="i3" placeholder="工作">
<input type="button" value="添加" onclick="f()">
<table border="1">
    <tr>
        <th>姓名</th><th>工资</th><th>工作</th>
    </tr>
</table>
<script>
    //获取三个文本框
    let i1 = document.querySelector("#i1");
    let i2 = document.querySelector("#i2");
    let i3 = document.querySelector("#i3");
    //通过标签名获取table
    let table = document.querySelector("table");
    function f() {
        //创建tr和td
        let tr = document.createElement("tr");
        let nameTd = document.createElement("td");
        let salaryTd = document.createElement("td");
        let jobTd = document.createElement("td");
        //把用户输入的内容添加到td中
        nameTd.innerText = i1.value;
        salaryTd.innerText = i2.value;
        jobTd.innerText = i3.value;
        //把td追加到tr
        tr.append(nameTd,salaryTd,jobTd);
        //把tr追加到table
        table.append(tr);
    }
</script>
</body>
</html>